Table 1.

Inclusion/exclusion criteria

Inclusion criteria
Studies in patients with IPF and other ILDs:     ILDs including idiopathic conditions (IPF and non-IPF idiopathic interstitial pneumonias), autoimmune-related ILDs, exposure related conditions, chronic sarcoidosis, hypersensitivity pneumonitis and coal workers’ pneumoconiosis
Studies reporting relevant cough-related outcomes:     Humanistic burden of cough – patient reported through use of health-related quality of life instruments or qualitative assessment (focus group/interview series), caregiver health, and caregiver quality of life Economic burden of cough – healthcare resource use, direct and indirect costs, productivity losses
RCTs with relevant cough-related baseline measurements
Observational studies including cohort and population-based studies reporting relevant cough-related measures

Exclusion criteria
Patients without interstitial lung disease or without cough symptoms
In vitro studies
Studies that do not report relevant outcomes
Studies published prior to 2010
Non-English full-text articles
Non-human studies
Not containing original data
Case reports and case series
Conference abstracts
Editorials, commentaries, and letters

ILD: interstitial lung disease; IPF: idiopathic pulmonary fibrosis; RCT: randomised controlled trial